This stainless steel dummy source is approximately 1"
long and 1/2" in diameter. It has two welds - one joining the body to
the cap, and the other joining the cap to the base of an attachment
cable. The latter, a multi-wire stainless steel cable, has been cut
just above the point of attachment. When the capsule is shaken, you can
hear something rattle inside. It is non-magnetic.

The use of the cable indicates that it is an early type of
industrial radiography source. That this is the case was confirmed by Karl
Haff from ORNL where these types of sources were loaded. As such, the real versions would have contained either
Co-60 or Ir-192, probably in the 10 to 100 curie range.

This dummy source was
used in classroom presentations at Oak Ridge Associated Universities by
Haff - Karl Haff at different times headed up
ORNL's Source Safety Testing Program and their Radiochemical Processing
Program.